2 Books in 1 Boxset Included books: The Polyvagal Theory The Simplified Guide to Understanding the Autonomic Nervous System and the Healing Power of the Vagus Nerve - Learn to Manage Emotional Stress and PTSD Through Neurobiology Vagus Nerve Exercises Activate Your Natural Healing Power to Reduce Anxiety, Depression and Stress by Accessing the Secrets of Vagus Nerve Stimulation You Will Learn Th. 2 Books in 1 Boxset Included books: The Polyvagal Theory The Simplified Guide to Understanding the Autonomic Nervous System and the Healing Power of the Vagus Nerve - Learn to Manage Emotional Stress and PTSD Through Neurobiology Vagus Nerve Exercises Activate Your Natural Healing Power to Reduce Anxiety, Depression and Stress by Accessing the Secrets of Vagus Nerve Stimulation You Will Learn Th